deputydog95

I know it's a little nerdy.

Just curious what temps you see from inside to outside (front and rear), and the associated alignment.

I've finally settled on a tire (NT01). Been messing with the alignment and keeping track of the temps.

TRAKCAR

I will try in dec at Sebring.
It has been a while I checked.

mdrums

Hot!

GT3DE

I have a pyrometer that I use after making a suspension adjustment or try a different tire type. I do not use it otherwise. I have a notebook in my trailer with the readings if you want to look at it. I also recorded the car, track, date, time, weather and tire pressure.

deputydog95

I'd like to see that sometime Clark. As I said above, I'm going to settle on one tire and run a consistent setup optimized for the nittos.

When I was testing Nitto on the hoosier alignment, I was running -3.5 up front (zero toe) and -2.5 (4mm toe) in back. Saw temps on rear (inside to out 225-185) and front (inside to out 167-143).

Clearly too hot and way too uneven.

Moved the alignment to -2.5 front and -2 rear. Same toe as above.

Temps went way down. Rear 175-170 and front 155-150.

This alignment seems more appropriate for the nitto. Temp spread is near dead even across. Visible wear looks good too. I'm using a probe pyrometer for reference.

Is this hot enough? I was reading somewhere that a typical R comp should see around 200 degrees for optimum grip. I know that rear engine rear drive cars are going to see higher temps up front due to weight placement.

I am pretty happy with the nitto so far, but obviously if there's more to be had I wouldn't mind eeking it out. I don't know if that 200 number is factual, but clearly I'm no where near that. I would assume RA1 numbers should be comparable.

deputydog95

Once I get this figured out, probably no need to check them ever again unless I see bizarre tire wear.

85Gold

Dawg

Those are good temps. Looks like your sway bar adj got rid of the push. Now just need to drive it harder. NT01 seen to like around -2 in the rear and 2.5 to 2.8 front so you look good. FYI I was getting to 200 degrees in the rear on the 6GT3 on AD08's after 3 laps so I guess I was running a little to much slip angle.

Peter

deputydog95

What's optimum temp for R comps?

Street tires are easy to overheat

85Gold

Depends "your money product" on tire and manufacturer. Usually 200 hot is max.


Peter

deputydog95

Do you think there is a performance difference from say 175-200, or will the operate exactly the same way if they pass a threshold temp and don't exceed the max?

85Gold

I am not good enough to answer that ? Just personal experience the longer you stay out the slower they become up to a certain point driver and all else being = I know from running TT my golden laps are usually 2 & 3 then I start getting slower.

Peter

deputydog95

Everything I've read online, FWIW, keeps quoting 200 as the golden number. I don't see how that's possible. I'd have to run all sorts of crazy camber to get to that temp.

85Gold

Nope you just need to drive it Harder.

Peter

deputydog95

Talked to Nitto today. They said 185-200 is the target ideal temp. They thought the front temps were way too low and the back could benefit from a little more heat.

I was supposed to get an email from an engineer on how he thought I could get the temps up but I haven't heard back yet.

This may explain why the front end was pushing so badly when I switched to the nittos.

GT3DE

Tire temps depend on current weather, pavement temperature, and how hard you drive.
Rears should always be hotter than front on a rear drive, rear engine 911.
Your temps will get higher when you drive faster.